Im trying to drag and drop mp4 movies onto my uncles ipad air. It shows the files on itunes but they are not on the ipad. I have not done this in a while, is there something that has changed to transfer the files?
How about use 3rd party app for video? I use an app called HD player and it runs great on my iPad. And it supports file sharing under itunes so you can easily drag n drop to the app instead of fiddling around itunes sync (which can be confusing at times)
As a bonus it also plays mkv and it's free too! (There might be some iap though iirc)